Express as a function of a DIFFERENT angle, 0^(@) <= theta < 360^(@). cos(126^(@)) cos(◻^(@))

Understand reference angles: Understand the concept of reference angles. A reference angle is the acute angle formed by the terminal side of an angle and the x-axis. It is always between 0° and 90° and is found by looking at the angle's position in relation to the nearest x-axis.Determine angle quadrant: Determine the quadrant in which the angle lies. The angle 126° lies in the second quadrant, where the cosine function is negative.Find reference angle: Find the reference angle for 126°. To find the reference angle, subtract the angle from 180° because it is in the second quadrant. Reference angle = 180° - 126° = 54°Express using reference angle: Express cos(126°) using its reference angle. Since cosine is negative in the second quadrant and the reference angle is 54°, we can express cos(126°) as -cos(54°).

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Express as a function of a DIFFERENT angle,
0^(@) <= theta < 360^(@).

cos(126^(@))

cos(◻^(@))

Express as a function of a DIFFERENT angle, 0^{\circ} \leq \theta<360^{\circ} . $\newline$ $\cos \left(126^{\circ}\right)$ $\newline$ $\cos \left(\square^{\circ}\right)$

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Algebra 2

Sin, cos, and tan of special angles

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Q. Express as a function of a DIFFERENT angle,

0^{\circ} \leq \theta<360^{\circ}

\newline

\cos \left(126^{\circ}\right)

\newline

\cos \left(\square^{\circ}\right)

Understand reference angles: Understand the concept of reference angles. A reference angle is the acute angle formed by the terminal side of an angle and the x-axis. It is always between $0^\circ$ and $90^\circ$ and is found by looking at the angle's position in relation to the nearest x-axis.
Determine angle quadrant: Determine the quadrant in which the angle lies. $\newline$ The angle $126^\circ$ lies in the second quadrant, where the cosine function is negative.
Find reference angle: Find the reference angle for $126°$ . $\newline$ To find the reference angle, subtract the angle from $180°$ because it is in the second quadrant. $\newline$ Reference angle = $180° - 126° = 54°$
Express using reference angle: Express $\cos(126°)$ using its reference angle. $\newline$ Since cosine is negative in the second quadrant and the reference angle is $54°$ , we can express $\cos(126°)$ as $-\cos(54°)$ .